LM3503SQX-25/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - Adjustable Output Voltage - Current Limit Protection - Thermal Shutdown Protection

Package: 16-WSON (4x4)

Essence: The LM3503SQX-25/NOPB is a voltage regulator IC that provides a stable output voltage with low dropout. It is commonly used in various electronic devices to regulate and control the voltage levels.

Packaging/Quantity: The LM3503SQX-25/NOPB is available in a 16-WSON package, which stands for 16-pin Wafer Scale Package with a size of 4x4 mm. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.3V
• Dropout Voltage: 200mV at 100mA
• Maximum Output Current: 300mA
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM3503SQX-25/NOPB has 16 pins arranged as follows:

```

---

| | | 1 16| | | | 2 15| | | | 3 14| | | | 4 13| | | | 5 12| | | | 6 11| | | | 7 10| |___________| 8 9 ```

Functional Features

1. Low Dropout Voltage: The LM3503SQX-25/NOPB has a low dropout voltage of only 200mV at 100mA, ensuring efficient power conversion.

2. Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.2V to 3.3V, providing flexibility for different applications.

3. Current Limit Protection: The IC incorporates current limit protection, preventing excessive current flow and protecting the connected components.

4. Thermal Shutdown Protection: To prevent overheating, the LM3503SQX-25/NOPB includes thermal shutdown protection, which shuts down the device when the temperature exceeds a certain threshold.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion. - Adjustable output voltage allows flexibility in various applications. - Current limit protection safeguards connected components. - Thermal shutdown protection prevents overheating.

Disadvantages: - Limited maximum output current of 300mA may not be suitable for high-power applications. - Requires external components for proper operation.

Working Principles

The LM3503SQX-25/NOPB is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage from the output, adjusting the pass transistor's resistance to maintain a stable output voltage.

Detailed Application Field Plans

The LM3503SQX-25/NOPB finds applications in various electronic devices, including but not limited to: - Mobile phones - Portable media players - Digital cameras - Wireless communication devices - Battery-powered devices

Detailed and Complete Alternative Models

1. LM317: A popular adjustable voltage regulator with a wide input voltage range and high output current capability.
2. LM1117: A fixed-output voltage regulator available in various voltage options, offering low dropout and high accuracy.
3. LM7805: A fixed 5V voltage regulator commonly used in many electronic devices.

These alternative models provide similar functionality to the LM3503SQX-25/NOPB and can be considered as substitutes depending on specific requirements.

Word count: 408 words